27. You _____her the news, for she knew it already.
A. mustn’t have told B. can’t have told C. mightn’t have told D. needn’t have told
26.____Are you satisfied with what he has done?
____ Not in the least. It couldn’t have been ______.
A. so bad B. better C. worse D. the worst
25. After a long journey, my legs ______under me and I couldn’t walk any farther.
A. gave up B. gave out C. gave in D. gave away
24.The fact that people are afraid to go out at night is often a result of perceived( 感 知 )danger _____actual danger.
A. other than B. more than C. rather than D. better than
23. The naughty boy! He ____where he leaves his thing.
A. always forgets B. will always forget
C. is always forgetting D. has always forgotten
22.--You are always full of ____. Can you tell me the secret?
--Taking plenty of exercise every day.
A. power B. strength C. force D. energy
第一节 单项填空(共15小题)
21.As ____unemployment is very high nowadays, it’s very difficult for people to find ____ work.
A. the; 不填 B. the; a C.不填; 不填 D. an; the
31.(22分)
Ⅰ、科学家将分离得到的成熟的胡萝卜韧皮部细胞进行培养,由几个细胞发育成完整的新植株,据图回答:
(1) 这种生殖方式属于__________。所用的技术是____________。
(2) 分离出来的胡萝卜根细胞成为细胞团是通过 ________分裂来完成。
(3) 实验说明植物细胞具有_____________。
Ⅱ、如图表示正常女性与一个患血友病(用字母H h)男性结婚,通过减数分裂产生配子,精子H与卵细胞F结合形成的受精卵发育成为一个患血友病男孩的过程,据图回答:
(1) 图中A、D F的名称依次是__________ 、_____________ 、_____________。
(2) 图中F、H细胞的染色体组成依次是__________、 __________。
(3) 若G与F结合,则后代的基因型是______,表现型是___________。
高三第一学期期末考试
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